JPH0346447A - Remote control exchange opposite equipment - Google Patents

Abstract

PURPOSE:To attain the talking state of a remote control exchange subscriber brought forcibly into a non-talking state by referencing the allocated position of a busy subscriber stored in a talking channel storage memory and talking channel information at a fault. CONSTITUTION:A microprocessor 32 monitors the state of a communication line by inputting an alarm output outputted from communication line termination circuits 41-1-41-N periodically via an interface circuit 37. Through the monitoring, when fault information as to the communication line 14-1 is inputted from, e.g. the circuit 41-1, the processor 32 retrieves a talking channel storage memory 34 to list up the subscriber accommodation position of a remote control exchange using the faulty line 14-1 as a talking channel. Then the processor 32 sets the talking state information of the talking state storage memory 35 corresponding to the subscriber accommodation position using the listed-up line 14-1 to the non-talking state forcibly independently of the talking state information from the remote control exchange and reports it to a host device.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to telephone exchanges, and in particular to remote control that performs control when a failure occurs in the communication line of a remote control exchange operated under the control of a master telephone exchange. It relates to an exchange facing device.

[Conventional technology]

In some types of switching systems built within telecommunications networks,
A remote switching system is employed that includes a master telephone exchange and a remote control exchange that operates under the control of the master telephone exchange.

FIG. 2 shows an example of a system using such a remote switching method. In this system, a remote control exchange facing device 13 is connected to a communication path switch 12 of a master telephone exchange 11.

The remote control exchange facing device 13 has one end connected to a communication line 14.
Line termination circuits 15-1 to 15 connected to -1 to 14-N
-N are connected respectively. A master station terminal control device 16 is also connected to the communication path switch 12 of the master telephone exchange 11 . The master station terminal control device 16 is connected to each subscriber 18 via a subscriber circuit 17. A central processing unit 19 is connected to the communication path switch 12 for controlling it.

The other ends of the communication lines 14-l to 14-N are connected to line termination circuits 22-l to 22-N of the remote control exchange 21, respectively. The other ends of these line termination circuits 22-1 to 22-N are connected to a remote control exchange controller 23.

Each subscriber 25 of the remote controlled exchange 21 is connected to this remote controlled exchange controller 23 via a respective subscriber circuit 26.

In a system using such a remote control exchange, communication lines 14-1 to 14-N are connected between the master telephone exchange 11 and the remote control exchange 21, as described above. Furthermore, these communication lines 14-1 to 14-N include a group of communication channels of the master telephone exchange 11 and the remote control exchange 21, and a common signal channel for control. Control information between the master telephone exchange 11 and the remote control exchange 21 is transmitted on the control common signal channel. For example, call status signals representing on-hook or off-hook of a subscriber accommodated by remote control exchange 21 may be transmitted using a common signaling channel.

[Problem to be solved by the invention]

In the conventional remote control exchange control system described above, control is performed to transmit a call channel group used for calls by subscribers accommodated in the remote control exchange and a call status signal indicating the on-footer or off-footer status of a higher-order subscriber. A common signaling channel existed independently within the communication line.

Therefore, if a failure occurs in the communication line that includes the communication channel used by a subscriber of a remote control exchange, the subscriber will not be able to continue the call, but the call status number , if no failure occurs in the control common signal channel, the data will be transmitted normally. In such a situation, the master telephone exchange assumes that the call continues normally until the subscriber goes on-hook.

These drawbacks are not particularly problematic if the subscribers of the remote control exchange are ordinary telephones that are used by humans. That is, in this case, the speaker senses that there is an abnormality in the telephone when it becomes impossible to continue the conversation, puts the phone on hook, and ends the conversation.

However, a problem arises when the remote control exchange accommodates a device such as a facsimile machine or a computer terminal that controls outgoing calls and incoming calls in place of a general telephone set. In other words, if such equipment is installed, the call channels between the remote control switch and the master telephone switch must be Even if the included communication line becomes a failure,
The call does not end without going on-hook. For this reason,
There is a problem in that the master telephone exchange continues to bill those terminals that are in the middle of a call where the call channel becomes a failure.

Therefore, an object of the present invention is to forcibly change the call state of the remote control exchange subscriber who is using the call channel of the faulty communication line to a non-call state when a failure occurs in the communication line used as a call channel. An object of the present invention is to provide a remote control exchange facing device that can be set to a state.

[Means to solve the problem]

In the present invention, (i) the accommodating position of a subscriber in a call and the call channel in a call in a remote control exchange connected to the master telephone exchange by a communication line consisting of a group of communication channels and a common channel for control; (ii.
) When a failure occurs in a communication line used as a communication channel, the data held in this communication channel holding memory is referenced and the remote control exchange subscriber using the communication channel of the faulty communication line is A device facing a remote control exchange is provided with a reporting means for forcibly turning a call state into a non-call state and reporting this to a host device.

That is, in the present invention, the communication channel holding memory stores the correspondence relationship between the accommodating position of the subscriber in the remote control exchange and the communication channel in progress as retained data, so that when a failure occurs in the communication line, The data held in the call channel holding memory can be referenced, and the call state of the remote control exchange subscriber using the call channel of the faulty communication line is forcibly changed to a non-call state. The information is reported to the upper level device of the master telephone exchange.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to Examples.

FIG. 1 shows an outline of the circuit configuration of a remote control exchange facing device in an embodiment of the present invention. This remote control exchange facing device 31 corresponds to the conventional remote control exchange facing device 13 shown in FIG.

The remote control exchange facing device 31 of this embodiment includes a microprocessor 32. The microprocessor 32 is connected through a bus 33 such as a data bus to 29 memories, a talk channel holding memory 34 and a talk state holding memory 35, two interface circuits 36 and 37, and a dropper inserter circuit 38. One interface circuit 36 is connected to a host device of the master telephone exchange. Other interface circuit 3
7 are each connected to one end of the communication line via communication line termination circuits 41-1 to 41-N. The other ends of these communication lines are connected to line termination circuits 22-1 to 22-N of the remote control exchange shown in FIG. 2, respectively. The dropper inserter circuit 38 is connected to a multiplex/demultiplex circuit 42.

The interface circuit 36 of the device 31 facing the remote control exchange having such a configuration receives control information sent from the host device to the remote control exchange. This control information is decoded by the microprocessor 32, the transmission procedure is controlled, and the control information is passed to the dropper/inserter circuit 38. The dropper/inserter circuit 38 sends this control information to the control common signal channel of the multiplex/demultiplex circuit 42. This control information sent to the multiplexing/demultiplexing circuit 42 is sent to the communication line termination circuit 41-N in this embodiment, and from there it is sent via a signal channel assigned as a common signal line for control in the communication line. and transmitted to the remote control exchange.

One type of control information sent from such a host device to a remote control exchange is control information for setting a call bus for a subscriber of the remote control exchange.

This control information is sent from the host device when a remote control exchange subscriber starts a call. This control information is information that indicates the location where the remote control exchange accommodates the subscriber and the channel number of the call channel group in the communication line that gives the right to use the subscriber's call. The microprocessor 32 decodes this control information sent from the host device and sends information indicating the accommodation location of the calling subscriber and the channel used for the calling subscriber to the calling channel holding memory 34. and save it to this.

On the other hand, control information sent from the remote control exchange to the master telephone exchange is sent to the communication line termination circuit 41-N through a channel assigned as a common control channel among the communication lines 14-1 to 14-N. Sent out. Then, the signal is transmitted via the multiplex/demultiplex circuit 42 and the dropper/inserter circuit 38, and is then received by the microprocessor 32 under transmission procedure control. microprocessor 3
This control information received at 2 is sent to the host device via the interface circuit 36.

One of the control information sent from the remote control exchange to the master telephone exchange is call status information indicating the on-hook or off-hook status of the remote control exchange subscriber. When the microprocessor 32 receives the call state information, it writes the call state information into the address in the call state holding memory 35 corresponding to the subscriber to whom the call state information was sent.

By the way, the microprocessor 32 monitors the state of the communication line by periodically inputting alarm outputs outputted from the communication line termination circuits 41-1 to 41-N via the interface circuit 37. Through this monitoring operation, when fault information regarding the communication line 14-1 is inputted from the communication line termination circuit 41-1, the microprocessor 32 searches the communication channel holding memory 34 and identifies the faulty communication line 14-1. Restore the subscriber accommodation location of the remote control exchange used as a communication channel.

Next, the microprocessor 32 forces the call state information in the call state holding memory 35 corresponding to the subscriber accommodating position in use of the restored faulty overconfident line 14-1, regardless of the call state information from the remote control exchange. set to non-call state. Furthermore, the fact that the communication state has been forcibly set is reported to the host device via the interface circuit 36.

〔Effect of the invention〕

As described in detail above, according to the present invention, when a failure occurs in a communication line used as a call channel group, the accommodation position of the subscriber who is in a call held in the call channel holding memory and the call By referring to the communication channel information used for communication, the higher-level device forcibly changes the communication status of the remote control exchange subscriber who is using the faulty communication line as a communication channel to a non-communication state. Since we have decided to report this, we can stop billing for calls when calls become unavailable. Therefore, when the call service function is stopped, there is an effect that unnecessary charges to the subscriber can be prevented.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a block diagram showing an example of the configuration of a device facing a remote control exchange in an embodiment of the present invention, and Fig. 2 shows a master telephone exchange and a remote control operating under the control of the master telephone exchange. FIG. 1 is a system configuration diagram showing an example of an exchange system including exchanges. 14...Communication line, 31...Remote control exchange opposing device, 32...
. . . Microprocessor, 34 . . . Call channel holding memory, 35 . . . Call state holding memory, 36 . . . Interface circuit.

Claims (1)

[Scope of Claims] In a remote control exchange connected to the master telephone exchange by a communication line consisting of a group of communication channels and a common channel for control, the location where the subscriber is accommodated and the communication channel during the communication are There is a call channel holding memory that stores correspondence relationships as held data, and when a failure occurs in a communication line used as a call channel, the data held in this call channel holding memory is referred to and the failed communication line is 1. A device for facing a remote control exchange, comprising: reporting means for forcibly converting the call state of a remote control exchange subscriber using a call channel into a non-call state to a host device.